Fort-on-the-main



Patented Sept. 18, 1928.

UNITED STATES PATENT OFFICE.

m'rm LUTHER, KURT PIER/OH, AND ERICK KRANEPUHL, OF MANNHEIM, GER- IAN'Y,ASSIGNORS TO I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT, OF FRANK-IOBT-ON-THE-IAHV, GERMANY, A CORPORATION OF GERMANY.

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the so-called Marquarts mass (a hi hly fireproof product of purestkaolin and a umina) Isobutylamine is completely converted intoisobutyronitrile.

What we claim is:

1. The process of catalytically dehydrogenating or anic compounds whlchconsists in passing t e vapors of the said compounds at an elevatedtemperature over a catalyst comprising a compound of a metal with ametalloid alone selected from the fifth and sixth grou of the periodicsystem having an atomic weight between 31 and 209.

2. The process of catalytically dehydrogenating organic compounds whlchconsists in passing the vapors of the said compounds at an elevatedtemperature over a catalyst comprisin a compound of a heavy metal with ametalloi alone selected from the fifth and sixth group of the periodicsystem having an 20 In testimony whereof we have hereunto set 30 ourhands.

MARTIN LUTHER. KURT PIEROH. ERICH KRANEPUHL.

